Air collecting and delivering apparatus



W. D. SCOTT.

1,327,92 Patented Jam-13,1920.

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APPLICATION FILED JAN. 9. I919.

Patented Jan. 13, 1920.

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Specification of letters'l'atent. I PatentedJ till-13, 1920.

Application filed January 9, 1919. Serial No; 270,274.

To all whom it may concern:

' Beit known that I, WILLIAM D. Sco'r'r,a citizen of the United Statesof America, and

resident of Martins Ferry, county of Belmont, and vState of Ohio, haveinvented certain new and useful Improvements in Air Collecting andDelivering Apparatus, of which the following is a specification.

, This invention relates broadly to air propelling' apparatus, and moreparticularly to a fan or blowerg of that type or class commonly employedfor creating a circulation of air in mines.

The primary object the invention is to provide a device, speciallyadapted, as av ventilating apparatus for the passages of mines and thelike, which has a'relatively high degree of eificiency due to structuralfeatures thatprovide a maximum air-gathering and delivering capacitywith a minimum of air resistance and, consequently, with a minimum ofdriving power required in its operation.

In describing the invention in detail, reference is herein had-to theaccompanying drawings, in which is approximately or cylindrical form and'tion Figure 1 .is a view ,of the inv'ention partly mside elevation andpartly in broken sec- Fig. 2' is Y Fi 3 is'a vertical section of thecasing,

showmg. the rotor in front elevation'with its front auxiliary bladesremoved;

the ado-carrying hub showing in side elevation a fan blade mountedthereon:

Fig. 5 is a' front elevation of the hub carrred' by the rotor shaft,showing the oblique I 0' dlsposit'ion of. a blade with respect thereto;

and-

Fig. 6 is an enlarged-section of a modifiedform of blade. A

Referringto said drawings, in which like designating charactersdistinguish like parts throughout the several views A indicatesgenerally a rotor casing which comprises vertically dis osed end walls 1and an arc-shapedinclosmg' wall 2 whlch is supported by said end wallsand which extends from the rear end of, aiflat baseB to a perspectiveview ofthe rotor;

. Fig. 4 is an enlarged perspective view of 1 a point 4 located asuitable distance above the horizontal axial plane ofthe casing.

From the terminal point indicated to .the

front end of said base'3 jthe casing-is open providing in the front partof said casing a discharge opening 5 through which air col:

.lected within the casing A'is discharged, as

will hereinafter be described.

Located within said casing is a V rotor,

generally designated by, the letter B, the

shaftfi of which is mounted in suitable bearings, as 7, carried bysupports 8 disposed outside the casing at opposite sides 'Said rotor hasan eccentric disposition with respect to the casing, being so locatedthat the capacity of the space between the periphery of the rotor andthe wall 2 and base 3 of the casing graduallyincreases from the frontterminal point 4' of said wall to the discharge 0pening 5. Locatedin'theopposite 'endwallsl of said casing are circular 'air intakeopenings 9which'have a concentric disposition with respect to 'saldrotor, ,saidopenings being of less diameter. than that'of said rotor. I

The rotor comprises the shaft 6 wh ch has mounted thereon at apoint-midway between" theend-walls 1.of the casing a plain circular 4plate 10. Rigidly mounted on said shaft at opposite sides of, and at aspaced distance 'from, said plate 10 are two hubs 11 each ofWhichcarries a plurality of spaced'rad1ally. vdisposed arms 12. MRig-idly attached to each of said radial arms 12 is the middle'portionof a fan orpropeller blade '13 which is of approximately semi-circularform.

Said,"

blade is mounted withits curved ed e outer- I most and with its straightchord- 1ke' edge adjacent to the hub 11. Each of said blades are rigidlyattached to the inner face-of a circular ring-.like'plate .14 whichhasap-' proximately the same external diameter as" i the platelb'andwhich has a concentric arrangement with to said plate the 'shaft6. Said 1411.16

100- and 1 crosses the shaft'G in a diagonal direction, as shownmostclearly in' Fig. 3, and has one end thereof rigidly attached to thearhacentv face of the plate 10. at a suitable distance inward from theperiphery of the latter.

, ts The opposite endsof each' set of the blades closely adjacent to theend walls 1 of the casing, and the internal diameters of said ringsapproximate the diameters of theintake openings 9 in said end-walls.openings in said rings register with said openings 9 so that said ringsoffer negligible obstruction to the entrance of air through said intakeopenings. 4 V

Interposed between each ofthe rings '14 and the adjacent face of theplate 10 near the peripheral edges thereof is a plurality of transversehorizontal auxiliary blades 15,

:as is clearly shown-.in- Fig. 2. Said auxiliarv blades have asubstantially radial disposition, but preferably have their inner edgesinclined slightly in a forward direction, as is best show-n in Fig. 1,to accelerate somewhat the delivery of air in a manner which willhereinafter be described.

. While the ends of the blades 13 may be attached to the plate, 10 andrings 14 in any suitable manner, it is preferred that each bladehaveitsopposite ends bent to such an angle that, it 1s disposed in a plane at aright angle to the shaft 6, as shown'at 16 in Figs. 3. and 4. Theopposite angularly disposed ends are then respectively secured to theplate 10 and adjacentring 1 L by-means of bolts or rivets 17.

It will be observed that the rotor is divlded by the plate 10 into twosimilar sides in which the blades are reversely inclined so that when itis rotated forward an equal suction is created at opposite sides fordrawmg air into the casing through the intake openings 9. Thus, thedevice has a capacity equal to that of-two separate fans each hav- 1 ingthe capacity of one side, and possesses the obvlous advantage that thestresses imposed upon the twoopposite sides are e ualized, one sidebalancing the other. results in a smoothly and freely running structurewhich, in practice, possesses a maximum of efliciency with a minimumexpenditure of driving power.

In the modification illustrated inFig. 6, the lower or straight edge ofthe blade 13 is turned outwardat a suitable angle so that a flange 18inclined toward the adjacent end wall 1 of the casing is provided, suchflange being designed to increase somewhat the airgathering capacity ofthe blade. .In like manner the curved or peripheral edgeof the blade maybe turned inward at a slight angle,.as shown at 19 in Fig. 6, toslightly increase the capacity of the blades for impelling collectedair.

In. practice, the rapidly rotating blades- 13 at opposite sides .of thedivision plate 10 produce a powerful suction for drawing air through the.opposite intake openings 9 of thecasm-g, whence they impel the indrawn"air forward and direct it outward with The great force through thedischarge opening 1. Anair collectlng and delivering apparatuscomprising a casing having an airintake opening in each of its oppositesides and a discharge opening in the front wall thereof, and a rotormounted within said casing, said rotor comprising a shaft, a pair offansmounted on sa1d shaft, each fan consisting of a plurality ofapproximately semicircular blades disposed in upright radial positionswith their chord-like edges diagonally crossing said shaft, a 'disk likewall interposed between said fans and having the inner ends of said fanblades attached thereto, the blades of the opposite fans being reverselyarranged so that each fan acts to draw air inward through the adjacentintake opening, a ring connecting the extreme outer ends-of the bladesof each fan, and transverse auxiliary blades interposed between eachring and the adjacent side of said disklike wall.

2. An air collecting and delivering apparatus comprising a casing havingan anintake opening in each of its opposite sides and a dischargeopening in the front wall thereof, and 'a rotor mounted within saidcasing, said rotor comprising a shaft, apair of fans-mounted on saidshaft, each fan cons'isting of a plurality of approximatelysemi-circular blades disposed in upright radial position with respect tosaid shaft and having theirchord-like edges diagonally crossing saidshaft and extending approximately equal distances on each side thereof,a wall carried by said shaft between said fans and having the inner endsof. said'fan blades attached thereto, and a plate-like ringconnecting'the outer ends of the blades of each fan, theopenings'through said rin s being in register with the'ad a'cent mtaiieopenings.

3. An air collecting and delivering apparatus comprising a casing havingan airintake opening in each of its opposite sides and a dischargeopening in the front wall thereof, and a rotor mounted within saidcasing, said rotor comprising a shaft, a pair of fans mounted on saidshaft, eac'h fan consisting of a plurality. of blades ofapproxi- -mately semi-circular form disposed in positions with their chord-like edgesdiagonally arraiige'd so each fan acts to draw air crossing said shaft,each blade having an inward through theadjacent intake opening. 10 Ioutwardly inclined flange on its chord-like In testimon whereof, I aflixmy signature edge and an inwardly inclined flange on its in presence 0ttwo subscribin witnesses. curved edge, and a disk-like wall interposed-WILLIAM SCOTT. between said fans and having the inner ends Witnesses: Iof said fan blades attached thereto, the L. BjWoon, blades of theopposite fans being reversely H. E. DUNLAP.

